ASP Electrical Safety

Question 1

According to NFPA 70E, what is the primary purpose of an arc flash hazard analysis?

Accepted Answer

To determine the incident energy at a worker's position and select appropriate PPE

Answer

An arc flash hazard analysis determines the incident energy level at a worker's working distance so that appropriate arc-rated PPE can be selected.

Question 2

Under OSHA 29 CFR 1910.333, a 'qualified worker' performing electrical work must demonstrate which of the following?

Accepted Answer

Ability to avoid hazards of working on or near exposed energized parts

Answer

OSHA defines a qualified person as one who has training and experience to recognize and avoid the electrical hazards present in energized work.

Question 3

What effect does an alternating current (AC) of approximately 100–300 mA have on the human body?

Accepted Answer

Ventricular fibrillation and likely death

Answer

Currents in the 100–300 mA range passing through the chest are sufficient to cause ventricular fibrillation, which is often fatal without immediate defibrillation.

Question 4

Which OSHA standard governs electrical safety-related work practices for general industry?

Accepted Answer

29 CFR 1910.331–.335

Answer

OSHA 29 CFR 1910.331–.335 (Subpart S) covers electrical safety-related work practices for general industry workers.

Question 5

A Ground Fault Circuit Interrupter (GFCI) is designed to trip when it detects a ground fault current exceeding:

Accepted Answer

4–6 milliamperes

Answer

GFCIs are designed to trip at 4–6 mA of ground fault current, a level below the threshold for serious injury, protecting people from electrocution.

(ASP) Associate Safety Professional Practice Test

(ASP) Associate Safety Professional Practice Test

ASP Electrical Safety